package com.sonymusic.dx.dxadvsearchservice.service;

import com.sonymusic.dx.dxadvsearchservice.dto.TrackMediumDTO;
import com.sonymusic.dx.persistence.gras.TrackMediaType;
import jakarta.persistence.EntityManager;
import jakarta.persistence.PersistenceContext;
import jakarta.persistence.TypedQuery;
import jakarta.persistence.criteria.CriteriaBuilder;
import jakarta.persistence.criteria.CriteriaQuery;
import jakarta.persistence.criteria.Root;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class TrackMediumService {

    @PersistenceContext(name = "dx-gras-persistence")
    private EntityManager em;

    public List<TrackMediumDTO> getListOfTrackMedium() {
        CriteriaBuilder cb = em.getCriteriaBuilder();
        CriteriaQuery<TrackMediumDTO> cq=cb.createQuery(TrackMediumDTO.class);
        Root<TrackMediaType> root =cq.from(TrackMediaType.class);
        cq.select(cb.construct(
                TrackMediumDTO.class,
                root.get("mediaTypeKey"),
                root.get("mediaTypeName")
        ));
        cq.orderBy(cb.asc(root.get("mediaTypeName")));
        cq.distinct(true);
        TypedQuery<TrackMediumDTO> query = em.createQuery(cq);

        return query.getResultList();
    }
}